Why Choose Us?

Founded in 2000, Complete Basement Systems is a locally owned and operated business that is licensed, insured, and certified to do business in all of Long Island.

We are the go-to contractor for basement waterproofing, basement repair, spray foam joist insulation -- and we work wonders with wet crawl spaces, too! Regardless of what you'd like done with your basement, we can help.

Professional Basement Waterproofing

We stop water from entering your basement through walls, floors, doors or windows, getting rid of the damp and musty sells caused by mold growth. We will install hidden interior drains and a sump pump to your basement. The drains are designed to avoid clogs and the sump pumps have back up and batter powered back pumps to provide fail-safe water removal.

As part of the Basement Systems International network of basement contractors which provides us access to patented products unavailable anywhere else. Our basement waterproofing system has proven itself across America for over 20 years.

Crawl Space Repair

Moisture is the key ingredient to making the crawl space a perfect place for mold to thrive. Mold spores can then easily circulate through floors and walls to enter living spaces above - where they add to the misery of being and allergy or asthma sufferer. In addition, moisture, over time, can cause the beams, posts, and joists that support your home to rot. Don't wait until the cost to make structural repairs becomes too great. Call us now for a free inspection and estimate.

Spray Foam Insulation

Many homes are built with improper insulation, leaving cracks and holes throughout the house that allow both air flow and heat loss making your home uncomfortable and increasing your energy bills at the same time. Our highly trained technicians install closed-cell polyurethane spray foam sealing these gaps in your home preventing the unwanted air flow while insulating your home.